CVE-2023-40371

Local file disclosure via improper access controls

Published Aug 24, 2023 · Updated Oct 1, 2024

Improper access control in IBM AIX OpenSSH on AIX 7.2 and 7.3 and VIOS 3.1 allows local users to read files beyond permitted access. IBM has not published the affected OpenSSH file or function, or how its access-control decision permits reads beyond the caller's authorization. A non-privileged local account is required, and the documented consequence is unauthorized file disclosure without reported modification or service interruption.

CVSS severity6.2
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in IBM AIX OpenSSH on AIX 7.2 and 7.3 and VIOS 3.1 allows local users to read files beyond permitted access. IBM has not published the affected OpenSSH file or function, or how its access-control decision permits reads beyond the caller's authorization. A non-privileged local account is required, and the documented consequence is unauthorized file disclosure without reported modification or service interruption.

The record

CVE
CVE-2023-40371
Published
Aug 24, 2023
Updated
Oct 1, 2024
Vendor
IBM
Product
AIX
Classifications
CWE-327, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.2, 7.3, VIOS 3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IBM · AIXversion=7.2, 7.3, VIOS 3.1

Published CVSS scores

6.2IBM CNACVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.2IBMCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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